org.apache.spark.sql.catalyst.expressions

MutableProjection

Related Doc: package expressions

abstract class MutableProjection extends Projection

Converts a Row to another Row given a sequence of expression that define each column of the new row. If the schema of the input row is specified, then the given expression will be bound to that schema.

In contrast to a normal projection, a MutableProjection reuses the same underlying row object each time an input row is added. This significantly reduces the cost of calculating the projection, but means that it is not safe to hold on to a reference to a Row after next() has been called on the Iterator that produced it. Instead, the user must call Row.copy() and hold on to the returned Row before calling next().

Linear Supertypes
Projection, (Row) ⇒ Row, AnyRef, Any
Known Subclasses
InterpretedMutableProjection
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Instance Constructors

  1. new MutableProjection()

Abstract Value Members

  1. abstract def apply(v1: Row): Row

    Definition Classes
    Function1

  2. abstract def currentValue: Row

  3. abstract def target(row: MutableRow): MutableProjection

    Uses the given row to store the output of the projection.

Concrete Value Members

  1. final def !=(arg0: Any): Boolean

    Definition Classes
    AnyRef → Any

  2. final def ##(): Int

    Definition Classes
    AnyRef → Any

  3. final def ==(arg0: Any): Boolean

    Definition Classes
    AnyRef → Any

  4. def andThen[A](g: (Row) ⇒ A): (Row) ⇒ A

    Definition Classes
    Function1
    Annotations
    @unspecialized()

  5. final def asInstanceOf[T0]: T0

    Definition Classes
    Any

  6. def clone(): AnyRef

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  7. def compose[A](g: (A) ⇒ Row): (A) ⇒ Row

    Definition Classes
    Function1
    Annotations
    @unspecialized()

  8. final def eq(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef

  9. def equals(arg0: Any): Boolean

    Definition Classes
    AnyRef → Any

  10. def finalize(): Unit

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )

  11. final def getClass(): Class[_]

    Definition Classes
    AnyRef → Any

  12. def hashCode(): Int

    Definition Classes
    AnyRef → Any

  13. final def isInstanceOf[T0]: Boolean

    Definition Classes
    Any

  14. final def ne(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef

  15. final def notify(): Unit

    Definition Classes
    AnyRef

  16. final def notifyAll(): Unit

    Definition Classes
    AnyRef

  17. final def synchronized[T0](arg0: ⇒ T0): T0

    Definition Classes
    AnyRef

  18. def toString(): String

    Definition Classes
    Function1 → AnyRef → Any

  19. final def wait(): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  20. final def wait(arg0: Long, arg1: Int): Unit

    Definition Classes
    AnyRef
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    @throws( ... )

  21. final def wait(arg0: Long): Unit

    Definition Classes
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    @throws( ... )

Inherited from Projection

Inherited from (Row) ⇒ Row

Inherited from AnyRef

Inherited from Any

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